Paper-machine slice



June 10. 1

C. E. BRUNER PAPER MACHINE SLICE Filed Aug. 13 1923 Application filedAugust 13, 1923. Serial No. 657,075.

under pressure and passes out through a relatively narrow orificebetween the lower edge of the slice and the apron board. The width ofthis orifice determines the thickness of the sheet of. paper which is tobe formed. Slight irregularities and diflierences in relative speeds ofthe flow of the paper stock, necessitates auxiliary adjustment so thatthe paper stock will be deposited uniformly on the wire. The paper stockas it passes out throu h this orifice .formed by the lower edgeo theslice has a tendency to boilor eddy, due to the sudden release frompressure, which is a natural phenomena of a liquid when it passestlrough an orifice having relatively sharp e ges.

The object of my invention'i s, therefore, to provide a slice which willcontrol the flow of the paper stock, so as to materially eliminate theeddies and, boiling as the paper stock passes from under the slice.

A further object is to provide a lip for a slice of this character whichhas a uniform, constant, curvature at any of its adjustments and whichis ada ted to be ad justed only in a vertical p ane. That is, the minoradjustments of the slice will be taken care of by this lip without thenecessity of twisting the li about its horizontal axis, or causing the11 to be hinged so as to permit this minor :1 justment by the flexing ofthe bar.

I attain these objects in a slice com rising a paper making machine ofthe 0 aracter described, deckle frames, an apron board, a pendent plateconstituting a slice supported on said deckle frames over the apronboard of the machine, a bar of substantial cross section, provided witha longitudinal groove of substantial de th in which the lower edge ofthe slice 1s relatively slidable," verticall said bar being made ofsubstantial wi th, and its'lower face making an angle with thehorizontal thereby making the area of the opening under said bar oversaid apron'board greater at the inlet side than at the outlet side ofsaid opening, and means for raising and lowering said bar, whereby thearea of said inlet side of said opening is maintained constantrelatively to its outlet side, and

relatively to the raising and lowering of said bar.

I illustrate these and other objects in the, accompanying drawings, inwhich:

Fig. 1 is a fragmentary side elevation bf my improved slice in positionbetween the deckle frames of a paper machine;

Fig. 2 is a fragmentary perspective of one end of my slice with myimproved lip shown detached therefrom;

Fig. 3 is a diagrammatic section through the slice in place ona papermachine and shows the action of my slice in preventing the eddies andthe boiling eiiect of the paper stock due to the passage of the paperstock through a restricted orifice and Fig. 4 is a fragmentaryperspective view showing details of construction.

My improved slice is made with a main piece a which has an adjustablelip b on its lower edge. I provide an outstanding flange c on its upperedge and adjusting rods d, the lower ends of which seat in bosses 0 onthe adjustable lip. I provide recesses f in the outstanding flange c inwhich I journal the extended hubs g of the handle wheels it. These hubs9 have cut away portions g which fit in the recesses and the thickerportions form shoulders which bear on each side of the flange. The hubsg and the upper ends 5 of the adjustable rods d are threaded and thus byrotating the hand wheels the adjustable rods will be adjusted. Aspreviously described, the lower ends of the rods (Z are seated in thebosses e on the lip b and are held in place by set screws j so thattheycan have no relative movement in their seats. I provide a lockingnut 71 above each hand wheel h so that when'the hand wheel has adjustedthe rod d to the position desired, the locking nut is may be set so asto hold it in a set position. There are a number of these adjusting rodsspaced across the entire length of the'slice and thus the minoradjustments of the slice may be made by flexing the lip b by one orseveral of these adjusting rods. The major adjustments of'the slice aretaken care of in the ordinary manner at its ends. The slice is supportedat each end by brackets Z which are mounted onthe deckle frames m. Thebrackets have two outstanding ears n which are spaced so as to permit anadjusting nut o to be fitted closely between them. Each end of the slicehas an adjusting screw in which is rigid on a supporting flange p whichis arranged on each end of the slice. This screw p fits in the nut 0-and thus by rotating the nuts on either side of the slice will cause theslice to be lifted or lowered at that side.

The orifice beneath the slice through which the paper-stock passes isclosed on its sides by deckle straps q and on the bottom by an apronboard r. The stock passes from ofi the end of the apron board and ontothe wire 8 which is mounted over the breast roll t. It is to be noticedthat the lower face 6 of the slice b is inclined towards the apron board1' and the inner edge of the slice as b is curved so that the slice andthe apron board to ether form substantially a stream like ori ce andthusas the paper stock passes from under the lip it is contracted slightlyand, directed in straight lines. The slice is grooved along its entirewidth, as at a, which is of substantial depth. The lower edge of theslice a is substantially the same width as the groove and is of uniformthickness along its entire length and thus fits snugly in this groove.It follows therefore that the lip may be adjusted in relation to theslice and this adjustment will be taken care of by the lip sliding onthe lower edge of the slice and therefore will cause no opening throughwhich the stock might pass and thus spoil the sheet of paperv beingformed by spurting through and causing the formation to be uneven.

The adjustment for my improved lip is, therefore, made, entirely in averticalplane and the bar'is flexed also in a vertical plane,

that is the bar is relatively flexible and the adjusting bars (I are adated to force the lip downwardly or upwardly at oneportion o the slicebut at all points of adjustment, the angle of inclination of the loweredge of the slice through the apron board is t same. The contraction ofthe water as it passes throu h the slice is always therefore the same anthus the paper stock is deposited on the wire without any substantialdifference in speed or thickness so as to cause certain portions of thestock to move faster or slower than the remaining portions, thus t 0paper stock to cause an uneven deposi onthe wire.

I claim:

1. In a paper making machine of the character described, deckle frames,an apron board, a pendent plate constituting a slice supported on saiddeckle frames over the apron board of the machine, a bar with which thelower edge of the slice is relatively slidable, vertically, said barbeing made of substantial width, and its lower face making an anglewiththe horizontal thereby making the area of the opening under said barover said apron board greater at the inlet side than at the outlet sideof said opening.

2. In a paper making machine of the character described, deckle frames,an apron board, a pendent plate constituting a slice supported on saiddeckle frames over the apron-board of the machine, a bar with which thelower edge of the slice is rela tively slidable, vertically, said barbeing made of substantial width, and its lower face making an angle withthe horizontal thereby making the area of the opening under said barover said apron board greater at the inlet side than at the outlet sideof said opening, and means for'raising and lowering said bar.

I 3.- In a paper making machine of the character described, deckleframes, an apron board, a 'pendent plate constituting a slice supportedon said deckle frames over the apron board of the machine, a bar ofsubstantial depth in which the lower edge of the slice is relativelyslidable, vertically, said bar being made of substantial width, and itslower face making an angle with the horizontal thereby making the areaof the opening under said bar over said apron board greater at the inletside than at the outlet side of said opening, and means for raising. andlowering said bar, whereby the area of said inlet side of said openingis maintained constant relatively to its outlet side, and relatively tothe raising and lowering of said bar.

4. In a paper making machine of the character described, deckle frames,an apron board, apendent plate constituting a slice supported on said.deckle frames over the apron board of the machine, a bar provided with alongitudinal groove of substantial depth in which the lower edge of theslice is relatively slidable, vertically, said bar being made ofsubstantial width, and its lower face making an angle with thehorizontal thereby making the area of the opening under said bar oversaid apron board greater at the inlet side than at the outlet side ofsaid opening, and means for raising and lowering said bar, whereby thearea of said inlet side of said opening is maintained constantrelatively to its outlet side, and relaiively to the raising andlowering of said ar. 5. In a paper making machine of the characterdescribed, deckle frames, an apron supported on said deckle frames overthe apron board of the machine, a bar of substantial cross sect-ionprovided with a longitudinal groove of substantial depth in which thelower edge of the slice is 'rela tively slidable, vertically, said barbeing made of substantial width, and its lower face making an angle withthe horizontal thereby making the area of the opening under said barover said apron board greater at the inlet side than at the outet sideof said opening, and means for raising and lowering said bar, wherebythe area of said inlet side of said opening is maintained constantrelatively to its outlet side, and relatively to the raising andlowering of saidbar.

6. In a paper making machine of the character described, deckle frames,an apron board, a pendent plate constituting a slice supported on saiddeckle frames over the apron board of the machine, a bar of substantialcross section with which the lower edge of the slice is relativelyslidable, vertically, said bar being made of substantial width, and itslower face making an angle with the horizontal thereby making the areaof the opening under said bar over said apron board greater at the inletside than at the outlet side of said opening, and means for raising andlowering said bar, whereby the area of said inlet side of said openingis maintained constant relatively to its outlet side, and relatively tothe raising and lowering of said bar.

- CLARENCE BRUNER.

